Apparatus and method for directional drilling using coiled...

Details Apparatus and method for directional drilling using coiled... Apparatus and method for directional drilling using coiled...

E - Fixed Constructions

21

B

E21B 7/08 (2006.01) E21B 7/06 (2006.01)

Patent

CA 2196633

A steerable directional drilling tool assembly includes a bent housing defining a bend angle and having a mud motor in its upper section and a drill bit below its lower section, an orienting tool rotatably coupled to such upper section and suspended on coiled tubing that extends upward to the surface, an electric motor in the orienting tool operable to rotate the bent housing in either hand direction to change or adjust the tool face angle of the bit, or continuously rotate the bent housing so that the bit drills straight-ahead, and an electric cable extending throughout the coiled tubing to furnish power from the surface to the electric motor and transmit electric signals to and from the surface. A logging tool can be included in the assembly for measuring characteristics of the formation, the borehole, and the tool assembly.

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